In theory if your friend has a router that supports VPN then they could set it up & give you access to it. Then you'd connect much the same way you've already been connecting (via the Windows VPN connection screens).

Routers w/ 3rd party firmware (e.g. Tomato Mods & DD-WRT) should be able to pull this off, otherwise you'd have to check w/ your friend on what sort of router they have & whether it supports setting up a VPN server.

Yes its possible via either custom router software (best option), or them allowing you to connect through there computer, if they would allow you is another thing...

Id personally prefer to spend $5-10 and have the added security myself with good speeds knowing none of us were going to hinder the otehr person playing online games, streaming or downloading, there is also the matter of illegal activity to think about specially with all the laws changing and being different in different states.

I just re-started paying for my vpn service and made it so it automatically dials the connection and starts "VPN LifeGuard" and before you ask...